EdX, the non-profit online learning organization with a huge roster of global institutions under the xConsortium participating, has been a leader in the free online education arena for several years. In June of last year, the organization released the code for its learning platform under an open source license. And, MIT has been leveraging the platform to deliver free online courses, as we covered here. Now, MIT has announced that it will start  offering for-profit courses on edX, beginning with a course on Big Data. Because of the salaries that people with Big Data skills are commanding in the job market, the course could be a good opportunity for job seekers.